Contracting EMS

My volunteer rescue squad is looking at the possibility of contracting ems for our county. At this time we have no career staff, so this is new to everyone and a very touchy subject with volunteers. I personaly, am against contracting it and believe we need to have a municiple fire/rescue system. I guess I may be a little bias because I'm a career firefighter. I am having a hard time finding a whole lot of information about contracing EMS, so if anyone can offer me any information, problems, etc. it would be appreciated.